mirror of https://github.com/lianthony/NT4.0
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
169 lines
3.7 KiB
169 lines
3.7 KiB
/***
|
|
*clock.c - Contains the clock runtime
|
|
*
|
|
* Copyright (c) 1987-1991, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* The clock runtime returns the processor time used by
|
|
* the current process.
|
|
*
|
|
*Revision History:
|
|
* 01-17-87 JCR Module created
|
|
* 06-01-87 SKS "itime" must be declared static
|
|
* 07-20-87 JCR Changes "inittime" to "_inittime"
|
|
* 12-11-87 JCR Added "_LOAD_DS" to declaration
|
|
* 03-20-90 GJF Made calling type _CALLTYPE1, added #include
|
|
* <cruntime.h> and fixed the copyright. Also, cleaned
|
|
* up the formatting a bit.
|
|
* 10-04-90 GJF New-style function declarators.
|
|
* 01-22-91 GJF ANSI naming.
|
|
* 07-25-91 GJF Added _pinittime definition for new initialization
|
|
* scheme [_WIN32_].
|
|
* 03-13-92 SKS Changed itime from static local to external as
|
|
* a part of return to initializer table scheme.
|
|
* Changed _inittime to __inittime.
|
|
* 05-19-92 DJM POSIX support.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#ifdef _POSIX_
|
|
#include <posix/sys/times.h>
|
|
#else
|
|
#include <sys\timeb.h>
|
|
#include <sys\types.h>
|
|
#endif /* _POSIX_ */
|
|
|
|
|
|
#ifndef _POSIX_
|
|
|
|
void __cdecl __inittime(void);
|
|
|
|
#ifdef _MSC_VER
|
|
|
|
#pragma data_seg(".CRT$XIC")
|
|
static void (__cdecl *pinit)(void) = __inittime;
|
|
|
|
#pragma data_seg()
|
|
|
|
#endif /* _MSC_VER */
|
|
|
|
struct _timeb __itimeb = { 0, 0, 0, 0 };
|
|
|
|
/***
|
|
*clock_t clock() - Return the processor time used by this process.
|
|
*
|
|
*Purpose:
|
|
* This routine calculates how much time the calling process
|
|
* has used. At startup time, startup calls __inittime which stores
|
|
* the initial time. The clock routine calculates the difference
|
|
* between the current time and the initial time.
|
|
*
|
|
* Clock must reference _cinitime so that _cinitim.asm gets linked in.
|
|
* That routine, in turn, puts __inittime in the startup initialization
|
|
* routine table.
|
|
*
|
|
*Entry:
|
|
* No parameters.
|
|
* itime is a static structure of type timeb.
|
|
*
|
|
*Exit:
|
|
* If successful, clock returns the number of CLK_TCKs (milliseconds)
|
|
* that have elapsed. If unsuccessful, clock returns -1.
|
|
*
|
|
*Exceptions:
|
|
* None.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
clock_t _CALLTYPE1 clock (
|
|
void
|
|
)
|
|
{
|
|
struct _timeb now;
|
|
clock_t elapsed;
|
|
|
|
#ifdef _CRUISER_
|
|
|
|
extern int _citime;
|
|
|
|
/* Reference _citime so __inittime gets executed at startup time.*/
|
|
|
|
_citime=0;
|
|
|
|
#endif /* _CRUISER_ */
|
|
|
|
/* Calculate the difference between the initial time and now. */
|
|
|
|
_ftime(&now);
|
|
elapsed = (now.time - __itimeb.time) * CLOCKS_PER_SEC;
|
|
elapsed += (int)now.millitm - (int)__itimeb.millitm;
|
|
return(elapsed);
|
|
|
|
}
|
|
|
|
/***
|
|
*void __inittime() - Initialize the time location
|
|
*
|
|
*Purpose:
|
|
* This routine stores the time of the process startup.
|
|
* It is only linked in if the user issues a clock runtime call.
|
|
*
|
|
*Entry:
|
|
* No arguments.
|
|
*
|
|
*Exit:
|
|
* No return value.
|
|
*
|
|
*Exceptions:
|
|
* None.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
void _CALLTYPE1 __inittime (
|
|
void
|
|
)
|
|
{
|
|
_ftime(&__itimeb);
|
|
}
|
|
|
|
#else /* _POSIX_ */
|
|
|
|
/***
|
|
*clock_t clock() - Return the processor time used by this process.
|
|
*
|
|
*Purpose:
|
|
* This routine calculates how much time the calling process
|
|
* has used. It uses the POSIX system call times().
|
|
*
|
|
*
|
|
*Entry:
|
|
* No parameters.
|
|
*
|
|
*Exit:
|
|
* If successful, clock returns the number of CLK_TCKs (milliseconds)
|
|
* that have elapsed. If unsuccessful, clock returns -1.
|
|
*
|
|
*Exceptions:
|
|
* None.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
clock_t _CALLTYPE1 clock (
|
|
void
|
|
)
|
|
{
|
|
struct tms now;
|
|
clock_t elapsed;
|
|
|
|
elapsed= times(&now);
|
|
if (elapsed == (clock_t) -1)
|
|
return((clock_t) -1);
|
|
else
|
|
return(now.tms_utime+now.tms_stime);
|
|
}
|
|
|
|
#endif /* _POSIX_ */
|